Inquiry #1: Layout Sheet L-3, shows the gore area at the R8 On-Ramp as having structural section 9. Yet the Typical Cross Sections Sheet X-3, show that area as having structural section 12. Please Clarify.Inquiry submitted 09/10/2012

Response #1:Submitted for consideration.Response posted 09/12/2012

Response #2:Typical Cross Section plan sheet X-3 is correct. The gore area along the "R8" Line on-ramp should be structural section 12. In addition, on Layout plan sheet L-3, the gore area along the "R6" Line on-ramp should be 10 instead of 9.Response posted 09/14/2012

Inquiry #5: Bid Item #151 is for 300LF of 36" Concrete Cylinder Sewer Pipe but when I review the 10-4.01 Sewers for the materials the specified pipe is Prestressed Concrete Cylinder Pipe per AWWA C301. The City of Petaluma probably does not have this pipe material in their system. The correct pipe material is more likely AWWA C303 Bar Wrapped, Concrete Cylinder Pipe. The C301 is not made locally (west coast) in 36" diameter. If the year the existing forcemain was installed is given we can try to confirm the type of pipe material. The specification also states that the joints are rubber gasketed but for this configuration shouldn't the joints be welded (lapweld). What is the internal working & test pressure design for the pipeline also?Inquiry submitted 09/27/2012

Response #1:Submitted for consideration.Response posted 10/02/2012

Response #2:The contractor suggested 36" Concrete Cylinder Pipe type AWWA C303, Bar Wrapped and with welded joints is a compatible alternative to the 36" Concrete Cylinder Pipe type AWWA C301 currently specified. However, the pipe in question shall be bid according to current plans and specs.

The year the existing forcemain was installed is 1966.

The internal working pressure is 20 to 40 PSI, and the internal test pressure is 100 PSI.Response posted 10/09/2012

Inquiry #6: Sheet 321 for the Route 101N/ 116 SOH (Replace) indicates a pile quantity of 203 for the Class 200 Alt "X" pile but the plans add up to 205 pile. Can you please clarify the correct quantity?Inquiry submitted 09/28/2012

Response #1:The bid opening date is October 10, 2012 and an addendum will not be issued. Contractor to bid per the current contract bid documents.Response posted 10/09/2012

Inquiry #7: Section 10-1.81 of the specifications references - Concrete Backfill (Rapid Strength Concrete) which states all work for this item shall be paid per cubic yard per Concrete Backfill (rapid strength concrete). Yet there is no bid item for Concrete Backfill (rapid strength concrete) please clarify. If concrete backfill (rapid strength concrete) is required please indicate for what scope of work since nothing is indicated on the Contract Drawings?Inquiry submitted 10/01/2012

Inquiry #9: What are the flow rates in GPM of the existing 36" sanitary sewer force main that will be relocated? Please provide both dry season & wet season flow rates.

How long in hours can the 36" sanitary sewer force main be completely shut down to allow a bypass pumping operation to be implemented?Inquiry submitted 10/02/2012

Response #1:Submitted for consideration.Response posted 10/02/2012

Response #2:The flow rates of the existing 36" sanitary sewer force main to be relocated is approximately 1,000 to 3,000 GPM during the dry season and 20,000 to 25,000 GPM during the wet season.

The 36" sanitary sewer force main may be shut down for up to 4 hours during non-peak hours in the dry season. Refer to Section 10-4.01, SEWERS, of the Special Provisions for Bypass Pumping Plan to be reviewed and approved by the Engineer.

Response posted 10/05/2012

Inquiry #10: Retaining Wall No. 179 appears to be the same wall that was included in Contract No. 04-2640U4 except the wall on this contract ends at Station 187+77.09 and the Retaining Wall No. 179 on Contract No. 04-2640U4 ends at Station 186+15.82. Please confirm the limits and quantities of the Retaining Wall No. 179 for this project.

Inquiry submitted 10/03/2012

Response #1:Submitted for consideration.Response posted 10/04/2012

Response #2:The limits and quantities for Retaining Wall No. 179 for this contract are correct as shown.Response posted 10/05/2012

The information provided in the responses to bidder inquiries is not a waiver of Section 2-1.03, “Examination of Plans, Specifications, Contract, and Site of Work,” of the Standard Specifications or any other provision of the contract, nor to excuse the contractor from full compliance with the contract. Bidders are cautioned that subsequent responses or contract addenda may change a previous response.